397970983 has 2 divisors, whose sum is σ = 397970984. Its totient is φ = 397970982.

The previous prime is 397970957. The next prime is 397970999. The reversal of 397970983 is 389079793.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 397970983 - 2⁹ = 397970471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397910983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198985491 + 198985492.

It is an arithmetic number, because the mean of its divisors is an integer number (198985492).

Almost surely, 2^397970983 is an apocalyptic number.

397970983 is a deficient number, since it is larger than the sum of its proper divisors (1).

397970983 is an equidigital number, since it uses as much as digits as its factorization.

397970983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2571912, while the sum is 55.

The square root of 397970983 is about 19949.2100846124. The cubic root of 397970983 is about 735.5583601781.

The spelling of 397970983 in words is "three hundred ninety-seven million, nine hundred seventy thousand, nine hundred eighty-three".